Multitarget Pulse Field Ablation Guided by Endocardial and Non-invasive Atrial Driver Mapping (PFA+ADM) Pilot Study. Development of an Ablation Strategy to Improve the Efficacy of Long Standing Atrial Fibrillation Ablation in Patients With High Comorbidity Burden or Heart Failure

"* Informed consent gave by the patient.~* Implantable loop recorder procedure~* Clinical procedure starts~* Electrophysiologycal study~* Non-invasive map is obtained.~* Electroanatomical map of both atria is generated.~* Intracavitary electrogram (EGM) driver assessment~* Pulmonary vein isolation~* Extra pulmonary drivers ablation based on EGM findings (rotational and high frequency sites).~* Non-invasive map is obtained to assess ablation impact on driver distribution.~* Remap and extra pulmonary lesions are carried out until activity. At drivers sites disappears or decreases in at least 2 hertz or up to physician criteria.~* Patient follow up"